JP2019114910A - Communication apparatus and control method thereof - Google Patents

Abstract

An object of the present invention is to reduce the complexity of setting communication parameters. A communication device that provides a communication parameter to an external device is used in a first setting method for providing the communication parameter, and generates a first image that encodes information including the communication parameter. Generating means for generating a second image, which is used in a second setting method for providing communication parameters and encodes information including authentication information for performing authentication without including the communication parameters. Generating means, receiving means for receiving information used to determine which of the first setting method and the second setting method is to be used, and receiving the information based on the information received by the receiving means. Display means for displaying one of the first image and the second image. [Selection diagram] FIG.

Description

  The present invention relates to a technique of parameter setting in a communication apparatus.

  In recent years, electronic devices such as digital cameras, printers, mobile phones and smart phones are equipped with a wireless communication function, and these devices are increasingly connected to a wireless network to be used as communication devices. In order to connect an electronic device to a wireless network, it is necessary to set various communication parameters such as an encryption method, an encryption key, an authentication method, and an authentication key. For this reason, setting of communication parameters is complicated, and the threshold is high for users of digital cameras and printers. Therefore, a mechanism for simplifying the setting of communication parameters is used. In addition, in order to prevent information leakage of communication parameters, a mechanism for concealing the communication parameters by the public key cryptosystem and notifying the user terminal of the same is also used.

  Patent Document 1 discloses a technique for facilitating setting of communication parameters in a communication terminal by interposing a QR code (registered trademark) image including information of communication parameters. In addition, in the Wi-Fi (registered trademark) alliance, public key information is provided to a communication terminal through a QR code image or the like, and communication parameters are provided to a communication terminal connected by a communication path using the public key. The DPP method is being considered. DPP is an abbreviation of Device Provisioning Protocol.

Unexamined-Japanese-Patent No. 2006-261938

  However, when there are a plurality of communication parameter setting methods using QR code images, QR code images corresponding to the number of methods are displayed. For example, in a communication device compatible with two setting methods, two QR code images are displayed. Therefore, the user may be confused as to which QR code image should be taken.

  The present invention has been made in view of such problems, and it is an object of the present invention to provide a technology capable of reducing the complexity of setting communication parameters.

In order to solve the above-mentioned problems, the communication apparatus according to the present invention has the following configuration. That is, the communication device that provides the communication parameters to the external device is
First generation means for generating a first image obtained by encoding information including the communication parameter, which is used in the first setting method for providing the communication parameter;
Second generation means for generating a second image obtained by encoding information including authentication information for performing authentication without using the communication parameter, which is used in a second setting method for providing communication parameters; ,
Accepting means for accepting information used to determine which one of the first setting scheme and the second setting scheme is to be used;
Display means for displaying any one of the first image and the second image based on the information received by the reception means;
Have.

  According to the present invention, it is possible to provide a technology that can reduce the complexity of setting communication parameters.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole structure of the communication system concerning 1st Embodiment. FIG. 2 is a block diagram showing a functional configuration of a printer. It is a flowchart of QR Code image display processing in a 1st embodiment. It is a figure which shows an example of the selection screen of a setting system. It is a sequence diagram which shows the setting process by a legacy system. It is a sequence diagram which shows the setting process in a DPP system. It is a flow chart of other QR Code picture display processing. It is a figure which shows an example of the selection screen of OS version. It is a flowchart of QR Code image display processing in a 2nd embodiment.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. The following embodiment is merely an example and is not intended to limit the scope of the present invention.

First Embodiment
As a first embodiment of the communication apparatus according to the present invention, a printer that forms a wireless LAN-based network conforming to the IEEE 802.11 series and receives a wireless connection from a portable device will be described below as an example.

<System Configuration and Device Configuration>
FIG. 1 is a diagram showing an entire configuration of a communication system according to the first embodiment. The communication system includes a printer 101 forming a wireless network 103 and a portable device 102 connected to the wireless network 103.

  The printer 101 has a wireless LAN function, and operates, for example, as a configurator or access point defined in DPP. The printer 101 can form the wireless network 103 as an access point. Also, it can provide communication parameters for connecting to the wireless network 103 formed by itself as a configurator. Here, the communication parameters include setting items necessary for performing wireless communication such as an SSID (Service Set Identifier) as a network identifier, an encryption method, an encryption key, and an authentication method. The printer 101 can generate a code image in which communication parameters are encoded or a code image in which a public key used in DPP is encoded. In the following description, it is assumed that a QR code image is used as a code image.

  The portable device 102 has a wireless LAN function, and operates, for example, as an enrollee defined in DPP. In addition, the portable device 102 has a camera, and can capture an area around the portable device 102. Here, a setting application for setting a wireless LAN parameter of the mobile device 102 is installed in the mobile device 102, and it is assumed that the setting application controls the camera and shoots the surroundings. The portable device 102 acquires encoded information, that is, communication parameters for connecting to the wireless network 103 and a public key used in DPP by capturing a QR code image displayed by the printer 101 with a camera. Can.

  In the following description, the printer will be described as an apparatus forming a wireless network, and the portable apparatus will be described as an apparatus connecting to a wireless network. However, the present invention is not limited thereto. That is, it may be any communication device having a wireless network function, and may not be portable. Moreover, as a portable device, communication devices such as a mobile phone, a digital camera, a video camera, a PC, a PDA, a smartphone, a smart watch and the like can be mentioned, but the present invention is not limited thereto.

  FIG. 2 is a block diagram showing the functional configuration of the printer 101. As shown in FIG. Here, it is assumed that each functional unit is realized by the computer (processor) executing a program stored in the memory. However, some or all of the functions may be realized by dedicated hardware.

  The wireless communication control unit 201 controls communication using an antenna, a circuit, and the like for transmitting and receiving a wireless signal to and from another wireless device via a wireless LAN. The transmission / reception unit 202 performs transmission / reception control of data according to the protocol of each communication layer.

  The operation unit 203 receives an operation on the printer 101 from the user. The operation unit 203 includes a button for starting connection processing to a wireless network. The operation unit 203 may be configured by hardware (physical buttons, switches, and the like), or may be configured by a UI provided by software using the display unit 204. The display unit 204 outputs information that can be recognized visually and audibly, such as an LCD, an LED, or a speaker, and notifies the user of various information.

  The control unit 205 is configured by a processor such as one or more CPUs, and controls the entire printer 101. The storage unit 206 includes one or more ROMs storing programs and data for controlling the printer 101, and one or more RAMs for temporarily storing. The various operations of the flowchart to be described later are realized by executing control programs stored in the storage unit 206 to control the respective functional units.

  The code generation unit 207 generates a QR code image. In addition, although a QR code image is used as an image of code information here, a barcode image, another two-dimensional code image, etc. may be used.

  The method determination unit 208 determines the setting method selected by the user via the operation unit 203. Here, the setting method means a method for providing a wireless LAN parameter to an external device (for example, the portable device 102). Here, it is assumed that “legacy method” and “DPP method” can be used as the setting method.

  Here, the legacy method is a method in which a QR code image obtained by encoding information including communication parameters is provided and connected to an external device. The DPP method is a method of providing a QR code image obtained by encoding information including a public key (specific to the printer 101) related to the printer 101 to an external device for connection. Specifically, the external device transmits an authentication request to the printer 101 using the acquired public key, and receives communication parameters from the printer 101 via the encrypted communication path. That is, the public key included in the QR code image is used as authentication information for performing authentication.

  Note that other setting methods may be used. For example, a method may be used in which a QR code image obtained by encoding information necessary for connection by Wi-Fi Direct (registered trademark) is provided to an external device and connected.

  The communication parameter processing unit 209 performs processing for providing communication parameters for connecting to the wireless network 103. The IP address processing unit 210 performs setting processing of the IP address of the printer 101 itself, and processing of distributing the IP address to the portable device 102 connected to the wireless network 103.

  In addition, each role assignment of each function part mentioned above is a mere example. The two or more functional units described above may be configured as one functional unit, or the above-described one functional unit may be configured as two or more functional units.

<Operation of device>
FIG. 3 is a flowchart of the QR code image display process in the first embodiment. Specifically, the printer 101 that provides communication parameters is a process for displaying a QR code image based on the setting method selected by the user. The process in FIG. 3 is started when the printer 101 receives an instruction from the user via the operation unit 203 to start connection processing to a wireless network. In the first embodiment, the case where the printer 101 does not form the wireless network 103 when the portable device 102 starts setting of communication parameters will be described.

  In step S301, the printer 101 confirms that the user has pressed a button for starting connection processing to a wireless network. After confirming the start instruction from the user, the process proceeds to S302.

  In step S302, the printer 101 controls the IP address processing unit 210 to set the IP address in the printer 101 itself. Here, as the IP address, one previously set by the user may be used, or one determined autonomously by the printer 101 may be used.

  In step S303, the printer 101 controls the wireless communication control unit 201 to form the wireless network 103 and start an operation as an access point. Note that the operation as an access point in S303 includes starting the operation as a P2P Group Owner when executing Wi-Fi Direct. Here, parameters such as a Service Set Identifier (SSID), an encryption method, an encryption key, and an authentication method of the wireless network 103 may be set in advance by the user, or may be determined autonomously by the printer 101. May be used.

  In step S304, the printer 101 controls the code generation unit 207 to generate a QR code image for the legacy method. In step S305, the printer 101 controls the code generation unit 207 to generate a QR code image for the DPP method. The order of executing S304 and S305 may be reversed. Further, the QR code image may be generated after the determination processing in S307 described later.

  In step S306, the printer 101 controls the display unit 204 to display a selection screen for receiving from the user which of the legacy method and the DPP method is to be connected. FIG. 4A is a view showing an example of a setting method selection screen displayed on the display unit 204. As shown in FIG.

  In step S307, the printer 101 determines which of the legacy method and the DPP method is selected on the selection screen. When it is determined that the DPP method is selected (YES in S307), the process proceeds to S308, and when it is determined that the legacy method is selected (NO in S307), the process proceeds to S309.

  In step S308, the printer 101 controls the display unit 204 to display the QR code image for the DPP method generated in step S305 on the display unit 204. On the other hand, in step S309, the printer 101 controls the display unit 204 to display the QR code image for the legacy method generated in step S304 on the display unit 204.

  By the above processing, only one QR code image is displayed on the display unit 204 of the printer 101. Therefore, the user of the portable device 102 can set the communication parameters in the portable device 102 by photographing the displayed one QR code image with the portable device 102.

  When the QR code image is generated after the determination process in S307, only the QR code image for the determined method may be generated. As a result, since the QR code image to be generated can be reduced, it is possible to reduce the load of the generation process related to the QR code image.

  FIG. 5 is a sequence diagram showing setting processing in the legacy method. That is, a process in which the user selects the legacy system, the printer 101 displays the QR code image for the legacy system, and the portable device 102 acquires communication parameters based on the legacy system and connects to the wireless network 103.

  When the printer 101 confirms that the button for starting the process of connecting to the wireless network is pressed by the user (S501), the printer 101 sets an IP address in the printer 101 itself (S502), and forms the wireless network 103 ( S503).

  After forming the wireless network 103, the printer 101 generates a QR code image for the legacy method and a QR code image for the DPP method (S504, S505). After that, the printer 101 displays a selection screen (FIG. 4A) for causing the user to select which of the legacy method and the DPP method is to be connected (S506).

  After displaying the selection screen, the printer 101 stands by for the method selection from the user, determines that the legacy method is selected from the user (S507), and displays the QR code image for the legacy method (S508).

  On the other hand, when the portable device 102 receives an instruction to connect to the wireless network 103 from the user, the portable device 102 activates an imaging unit such as a camera for capturing a QR code image (S509). For example, when the user instructs to start the setting application, the setting application starts the camera and controls the camera according to the user operation to start imaging.

  The user directs the shooting direction of the camera of the portable device 102 to the QR code image displayed by the printer 101 in S508. The portable device 102 decodes the QR code image when the QR code image is captured (S510). The information indicated by the QR code image decoded in S510 includes communication parameters for connecting to the wireless network 103.

  The portable device 102 connects to the wireless network 103 by setting the communication parameter decrypted and acquired in S510 in the portable device 102 itself (S511).

  FIG. 6 is a sequence diagram showing setting processing in the DPP method. That is, a process is shown in which the user selects the DPP method, the printer 101 displays the QR code image for the DPP method, and the portable device 102 acquires communication parameters based on the DPP method and connects to the wireless network 103.

  When the printer 101 confirms that the button for starting the connection process to the wireless network is pressed by the user (S601), the printer 101 sets an IP address in the printer 101 itself (S602), and forms the wireless network 103 ( S603).

  After forming the wireless network 103, the printer 101 generates a QR code image for the legacy method and a QR code image for the DPP method (S604, S605). After that, the printer 101 displays a selection screen (FIG. 4A) for causing the user to select which of the legacy method and the DPP method is to be connected (S606).

  After displaying the selection screen, the printer 101 stands by for the system selection from the user, determines that the DPP system is selected from the user (S607), and displays the QR code image for the DPP system (S608).

  On the other hand, when the portable device 102 receives an instruction to connect to the wireless network 103 from the user, the portable device 102 activates an imaging unit such as a camera for capturing a QR code image (S609). For example, when the user instructs to start the setting application, the setting application starts the camera, and controls the camera according to the user operation to start imaging.

  The user directs the shooting direction of the camera of the portable device 102 to the QR code image displayed by the printer 101 in S608. The portable device 102 decodes the QR code image when the QR code image is captured (S610). The information indicated by the QR code image decoded in S510 does not include communication parameters for connecting to the wireless network 103, but includes the public key of the printer 101 used in the DPP method. The public key can be used for authentication of the printer 101 and encryption of a communication path when providing communication parameters.

  The portable device 102 that has acquired the public key of the printer 101 transmits an authentication request including the hash value of the public key of the printer 101 and the public key of the portable device 102 itself to the printer 101 (S611).

  The printer 101 that has received the authentication request determines whether the device that has transmitted the authentication request is a device that has captured a QR code image. Here, the hash value of the public key included in the QR code image generated in S605 is calculated. Then, the calculated hash value is compared with the hash value included in the authentication request received in S611. Then, if the two match, the portable device 102 that has transmitted the authentication request is authenticated as the device that has captured the QR code image. After that, the printer 101 transmits an authentication response indicating that the portable device 102 has been authenticated as an apparatus that has captured a QR code image (S612).

  The portable device 102 having received the authentication response in S612 confirms that the printer 101 has been authenticated, and transmits an authentication confirmation to the printer 101 (S613).

  The printer 101 that has received the authentication confirmation generates a shared key using both the public key of the portable device 102 received in S611 and the private key of the printer 101 itself. On the other hand, the portable device 102 that has transmitted the authentication confirmation generates a shared key using both the public key of the printer 101 acquired in S610 and the secret key of the portable device 102 itself. Here, the shared key is assumed to be generated based on, for example, ECDH (Elliptic Curve Diffie-Hellman), but may be generated based on another public key cryptosystem.

  The printer 101 transmits the communication parameter encrypted using the generated shared key to the portable device 102 (S614). That is, communication parameters are transmitted via the communication path encrypted using the generated shared key. On the other hand, the portable device 102 decrypts the encrypted communication parameter using the generated shared key. That is, the communication parameter is received through the communication path encrypted using the generated shared key.

  The portable device 102 connects to the wireless network 103 by setting the communication parameter decrypted and acquired in S614 in the portable device 102 itself (S615).

  As described above, according to the first embodiment, the printer 101 selectively displays the QR code corresponding to the setting method designated by the user. As a result, the user of the portable device 102 can set communication parameters in the portable device 102 by capturing one displayed QR code image with the portable device 102 without confusion.

<Other Example of Selection Screen>
In S306 described above, a selection screen (FIG. 4A) is displayed in which the user directly designates (selects) either the "legacy method" or the "DPP method". However, information that is more easily understood by the user may be received as the content of the setting method. For example, the number of QR code images to be displayed may be reduced to one according to the function of the mobile device 102. In the following description, as an example of the function of the mobile device 102, the case of selecting a QR code image to be displayed according to the version of the operating system (OS) of the mobile device 102 will be described.

  As an OS of the mobile device 102, for example, Android (registered trademark) can be considered. When the version of the OS is old, there is a possibility that the portable device 102 does not support the setting method of the DPP method which is a new method compared to the legacy method. In that case, even if the portable device 102 captures a QR code image for the DPP method, connection to the wireless network 103 can not be made. Therefore, based on the version of the OS installed in the portable device 102, an embodiment will be described in which the QR code image to be displayed is narrowed to one.

  FIG. 7 is a flowchart of another QR code image display process. Specifically, it is a flowchart showing processing for narrowing down the QR code image to be displayed to one based on the version of the OS installed in the portable device 102. The processing of S701 to S705 is the same as that of FIG. 3 (S301 to S305), and thus the description thereof is omitted.

  In step S706, the printer 101 controls the display unit 204 to display a selection screen for causing the user to select the version of the OS installed in the portable device 102. FIG. 8 is a view showing an example of an OS version selection screen displayed on the display unit 204. As shown in FIG. “X. X” of “Android X. X” is a version number, and for example, numbers such as “4.3” and “6.2” are set in advance. Although FIG. 8 shows a screen configuration for receiving whether or not it is a preset version or later, it may have another screen configuration. For example, the OS version may be received via a numeric keypad or the like, and the printer 101 may be configured to determine whether the received OS version is a preset version or later.

  In S707, the printer 101 determines which of “Android X. X or later” and “And less than Android X. X” is selected on the selection screen. If it is determined that "Android X. X or later" is selected (YES in 707), the process proceeds to S708, and if it is determined that "under Android X. X" is selected (NO in 707), the process proceeds to S709.

  In step S708, the printer 101 controls the display unit 204 to display the QR code image for the DPP method generated in step S705 on the display unit 204. On the other hand, in step S709, the printer 101 controls the display unit 204 to display the QR code image for the legacy method generated in step S704 on the display unit 204.

  As in the case of the process in FIG. 3, the QR code image may be generated after the determination process in S707 without generating the QR code image in S704 and S705. Moreover, although it demonstrated using Android as OS which the portable device 102 mounts, it does not restrict to this. For example, it may be Apple (registered trademark) iOS.

  Also, instead of the version of the OS, the version of the setting application may be used, or the combination of the version of the OS and the version of the setting application may be used. Arbitrary function information that can specify the setting method can be displayed as a selection screen (FIG. 8).

Second Embodiment
In the second embodiment, the case where the printer 101 has already formed the wireless network 103 when the portable device 102 starts setting of communication parameters will be described. For example, when the portable device 102 connected to the printer 101 is disconnected and reconnected according to FIG. 5 or FIG. 6, the situation may be such as when another portable device is newly connected.

  The system configuration and the device configuration are the same as those of the first embodiment (FIG. 1 and FIG. 2), and therefore the description thereof is omitted. However, in addition to the determination of the setting method described in the first embodiment, the method determination unit 208 further has a function of determining which setting method the QR code image displayed when the wireless network 103 is formed.

<Operation of device>
FIG. 9 is a flowchart of the QR code image display process in the second embodiment. The processes of S901 and S903 to S910 are the same as those in FIG. 3 (S301 and S302 to S309), and thus the description thereof is omitted.

  In step S902, the printer 101 determines whether the wireless network 103 has already been formed. If it is determined that the wireless network 103 has not been formed (NO in S902), the process proceeds to S903, and if it is determined that the wireless network 103 has been formed (YES in S902), the process proceeds to S911.

  In step S 911, the printer 101 determines which of the legacy method and the DPP method QR code images are displayed when the wireless network 103 is formed. If it is determined that the QR code image for the DPP method is displayed (YES in S911), the process proceeds to S912, and if it is determined that the QR code image for the legacy method is displayed (NO in S911), the process proceeds to S913.

  In step S912, the printer 101 controls the display unit 204 to display a QR code image for the DPP method on the display unit 204. On the other hand, in step S <b> 913, the printer 101 controls the display unit 204 to display the QR code image for the legacy method on the display unit 204.

  The QR code image displayed in S912 and S913 can be the same as the QR code image generated in S905 and S906 when the wireless network 103 is formed. However, it may be configured to be newly generated after the determination in S911. For example, by generating the QR code image after the determination in S911, it is not necessary to keep holding the QR code image after the wireless network is formed, and the storage capacity can be reduced.

  As described above, according to the second embodiment, when the wireless network 103 has already been formed, the printer 101 displays the QR code image for the setting method used when the wireless network 103 is formed. As a result, the user of the portable device 102 can set communication parameters in the portable device 102 by capturing one displayed QR code image with the portable device 102 without confusion.

  Here, it is assumed that the printer 101 keeps maintaining the network 103 formed according to FIG. 5 or 6 until the power of the printer 101 is turned off. However, when communication with the portable device 102 is not performed for a predetermined time, the formation of the network 103 may be terminated. If it is determined that the wireless network 103 has not been formed (NO in S902), the process proceeds to S903 if the start of setting is instructed after the formation of the network 103 is completed.

(Modification)
In each of the embodiments described above, not the QR code image but a barcode or a two-dimensional code may be used. Also, instead of displaying the encoded image suitable for reading by a computer, it may be displayed in a display format (such as ASCII characters) that can be easily understood by the user. The means for reading these pieces of information is not limited to a camera for capturing a QR code, but may be a reader device having a function of reading various codes.

  Although the case of performing wireless LAN communication conforming to the IEEE 802.11 series has been described as a wireless communication standard, the present invention is not limited to this. For example, it may be implemented using a wireless communication medium such as wireless USB, MBOA, Bluetooth (registered trademark), UWB, ZigBee, NFC and the like. Here, MBOA is an abbreviation for Multi Band OFDM Alliance. Also, UWB includes wireless USB, wireless 1394, WINET and the like.

  Moreover, although the case where the communication parameter for connecting to the access point of wireless LAN was provided was described, it does not restrict to this. For example, communication parameters for connecting to the Wi-Fi Direct P2P Group Owner may be provided.

  Further, in the above-described embodiments, only one wireless network of the printer 101 is formed. However, a plurality of wireless networks may be formed. For example, even if two wireless networks of a wireless network connectable by acquiring information of a QR code image for DPP method and a wireless network connectable by acquiring information of a QR code image for legacy method are formed Good.

  Further, in the selection screen displayed in S306 / S706 / S907, an option to display both of the two types of QR code images may be provided. FIG. 4B is an example of a selection screen displayed on the display unit 204, and a “skip” button is newly provided to FIG. 4A. When the user selects the "skip" button, two QR code images are displayed on the display unit 204. Alternatively, it may be configured to stand by for a predetermined time on the selection screen of FIG. 4A and to automatically display two QR code images on the display unit 204 when there is no selection input from the user.

(Other embodiments)
The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or apparatus via a network or storage medium, and one or more processors in a computer of the system or apparatus read and execute the program. Can also be realized. It can also be implemented by a circuit (eg, an ASIC) that implements one or more functions.

  101 printer; 102 portable device; 103 wireless network; 201 wireless communication control unit; 202 transmission / reception unit; 203 operation unit; 204 display unit; 205 control unit; 206 storage unit; 207 code generation unit; 208 scheme determination unit; Processing unit; 210 IP address processing unit

Claims (11)

A communication device for providing communication parameters to an external device, the communication device comprising:
First generation means for generating a first image obtained by encoding information including the communication parameter, which is used in the first setting method for providing the communication parameter;
Second generation means for generating a second image obtained by encoding information including authentication information for performing authentication without using the communication parameter, which is used in a second setting method for providing communication parameters; ,
Accepting means for accepting information used to determine which one of the first setting scheme and the second setting scheme is to be used;
Display means for displaying any one of the first image and the second image based on the information received by the reception means;
A communication apparatus comprising: The communication apparatus according to claim 1, wherein the receiving unit receives information based on a selection by a user indicating which of the first setting scheme and the second setting scheme is to be used. The communication device according to claim 1, wherein the receiving unit receives information on a function of the external device. 4. The display device according to any one of claims 1 to 3, wherein when the information is not accepted by the acceptance means, the display means displays both the first image and the second image. Communication device as described. Further comprising forming means for forming a wireless network;
The communication apparatus according to any one of claims 1 to 4, wherein the communication parameter is a parameter for connecting to the wireless network. The communication device according to claim 5, wherein the communication parameter includes an SSID of a wireless network formed by the forming unit. The apparatus further comprises determination means for determining whether the forming means has formed a wireless network.
If it is determined by the determination means that the forming means has formed a wireless network, the display means displays the first image or the second image displayed when the formed wireless network is formed. The communication device according to claim 5, characterized in that: An authentication unit that authenticates an external device using the authentication information;
Transmission means for transmitting the communication parameter to the external device authenticated by the authentication means;
The communication apparatus according to any one of claims 1 to 7, further comprising: The authentication information is a public key unique to the communication device, and the authentication unit authenticates the external device when the authentication request transmitted from the external device includes the information specifying the public key. The communication device according to claim 8, characterized in that: A control method of a communication apparatus for providing communication parameters to an external apparatus, comprising:
A first generation step of generating a first image obtained by encoding information including communication parameters, used in a first setting method for providing communication parameters;
A second generation step of generating a second image obtained by encoding information including authentication information for performing authentication without using the communication parameter, which is used in a second setting method for providing a communication parameter; ,
A receiving step of receiving information used to determine which one of the first setting method and the second setting method is to be used;
A display step of displaying any one of the first image and the second image based on the information received in the reception step;
And controlling the communication apparatus.   The program for functioning a computer as each means of the communication apparatus in any one of Claims 1-9.

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